Key and knob clamp.



PATENTED MAY 15, 1906.

W. DEUTSOH. KEY AND KNOB CLAMP. APPLIOATION FILED APR.8.1905.

WILLIAM DEUTSOH, OF BALTIMORE, MARYLAND.

IKEY AND KNOB CLAMP.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed April 3, 1905. Serial No. 254,572.

1'0 atZZ whom, it may concern.-

Be it known that 1, WILLIAM DEUTSOII, a citizen of the United States,residing at Baltimore city, State of Maryland, have invented a certainnew and useful Improvement in Key and Knob Clamps, of which thefollowing is a specification.

The present invention relates to a device for preventing rotation ofboth the knob and key of a door-lock mechanism.

In the accompanying drawings, Figure 1. is an elevation of a deviceconstructed in accordance with the present invention, showing the samein usev Fig.2 is a side view of the parts shown in Fig. 1. Fig. 3 is aface view of one of the members of the device.

Referring to the drawings, it will be seen that the improved knob andkeyfastening device comprises two members 1 2 of similar form and thateach of said members is made concave on its inner face adjacent one endto provide one aw 3 of a clamp adapted to engage the shank 4 of adoor-knob 5. The lower portions of the members 1 2 constitute jaws 6 ofa clamp adapted to engage the stem 7 of the key 8. The said members 1 2are connected by an adjusting-screw 9 by means of which both the clampfor engaging the key-stem and that for the knob-shank can besimultaneously opened and closed. A pin 10 is rigidly secured to themember 2 and extends through an elongated opening 11 in the member 1 andserves as a guide for the members as they are drawn together.

The device is particularly adapted for use in connection with a knob,the shank of which is secured to the lock-spindle 13 by a screw or otherfastening, having a head 14, which projects beyond the surface of saidshank, and therefore the inner surface of each jaw 3 is provided with aseries of recesses (shown as transverse grooves 15) each adapted toreceive the head 14 of the fastening by which the knob is secured tosaid spindle. As shown in Fig. 1, said recesses 15 and the riblikeportions of the jaw separating them are of such cross-sectional formthat no sharp edges are provided. Should it be desired to apply thedevice to a knob in which the fastening was directly above or below thespindle, it will be seen that the projecting head thereof would besecurely held between the upper ends of the jaws 3 or between the bodiesof the members 1 2 at the lower ends ofsaidjaws. The innerfaces ofthelowerjaws 6 are preferably roughened or corrugated, as

at 16, in order that they may more securely grip the key-stem. As shown,the jaws 6 are preferably made tapering, and the lower end of eachmember 1 2 is so shaped as to be adapted for use as a screw-driver, bymeans of which a screw 14, having a suitable head, may be applied, ifnecessary. Such a screw may be furnished with each device constructed inaccordance with this invention, and by using the screw-driver provided,as aforesaid, by the device the screw connecting the knob andlock-spindle may be readily removed, if not provided with a projectinghead, and a proper fastening 14 substituted.

The advantages of such a device as is above described and illustrated inthe drawings will be apparent. It will be seen that both the knob andkey are positively gripped between jaws and that a single screw 9 actsupon or closes both of the clamps and holds them securely in anyadjusted position.

Having thus described the invention, what I claim is 1.. Theherein-described key and knob fastener comprising two pairs of jaws,adapted to respectively engage the shank of a doorknob and the stem of akey, and an adjusting device connecting the members of the jaws andadapted to simultaneously open and close both said jaws.

2. The herein-described key and knob fastener comprising two members,each having a concave inner face adjacent to one end forming one jaw ofa clamp adapted to engage the shank of a door-knob, and each memberforming below such concave portion one jaw of a clamp adapted to engagea keystem, and means connecting said members between the jaw-sectionsthereof and adapted to positively close both of the clamps formedthereby.

3. The herein-described key and knob fastener comprising two membersforming adjacent the ends thereof clamps adapted to respectively engagethe shank of a door-knob and the stem of a key, a guiding pin or studrigidly secured, to one of said members and having one end extendingloosely through a passage in the other member, and an adjusting-screwalso connecting said members and adapted to open and close both theclamps formed thereby.

4. The combination with a door-knob having its shank secured to thelock-spindle by a fastening the head of which projects beyond thesurface of the knob-shank, of a fastening device comprising two membershaving concave jaws formed thereon and adapted to receive between themthe shank of the knob, one of said jaws having its concaved faceprovided With recesses of such form and dimensions as to receive theprojecting end or head of the fastening connecting said knob andlock-spindle, means for moving said jaws into close engagement With theknobshank, and means for engaging a key projectto tWo subscribingWitnesses.

WILLIAM DEUTSOH.

WVitnesses:

GEo. E. TAYLOR, WM. SPEHNKONCH.

